<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-model指令</title>
</head>

<body>
    <div id="app">
        <input type="button" value="修改message" @click="setM">
        <input type="text" v-model="message" @keyup.enter="getM">
        <h2>{{message}}</h2>
    </div>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>

</body>

<script>
    var app = new Vue({
        el: "#app",
        data: {
            message: "黑马程序员"
        },
        methods: {
            getM: function () {
                alert(this.message)
            },
            setM: function () {
                this.message = "酷丁鱼";
            }
        }
    })
</script>

</html>